Firearm



H C s T E N lm Nov. 24, 1925.

FIREARM Filed May 21. 192s 2 Sheets-Sheetl 1 J. NETSCH Nov. 24 1925- FIREARM Filed May 21. 1923 Patented Nv; 24, 1925.

f'rinmnn'i -nppucationmed myY 21,4923. serialneelo'zo'.

I' lTo all whom t may ol/hewn?" Be tlmown that Josnn Nntlson, t Citizen y of, C'Zeolloslovakle,V YYinsl'clng at .WPrAuskey VVCzeo'hoslovalait, luis Inwented certain new .Y

fired islpuslfecl yfori pressure of its' otvn Aspring retnrllsjrttoclose immediately, after `tliegfufli ofthe shgtf VmfVIIL-'Qf Figure. 1, v. fi

I y ,'efmployedgals@ quick firing gun; so; that by offff a lnoizalolef part i into effecty 'sjil-f On the"loznfelQ @sleeve is mounted 'so as t to be longitudinally'Inovble5 ande spring' introduced' between e rfront support ring jon'the barrel @anderem supporting ring' 6j on the sleeve @and on the fi'ont end'of the its jlearend a sprngtongue 11 provided onl its upper 'surface Wthninosepeeeor projec- Y v tonlQ and having ts'free end'l bevelleol and Wlloh' acts in `eooperation with, atapeled surface of a stop 141m` the Vcasing"lif 'ing piebelsgfaixedfm the rearotnefeasng 21al turning fthe V10619255 around' mongiv.tndnal axis s eleotedgfwhe'reby jt-lie bolt is .held backfn a knowny mannernndseured to `=thel closed position'. A

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by means of a handle, and thereby through the cross stay 17 the spring 19 put under tension. The fork 15 by means of the eX- tension 22 carries along with it the bolt 23 which is first turned by the groove of the stay 21, is un-bolted and the breech only then opened. At the same time the lever 25 in passing over presses down the hammer 27, which is caught and held by a catch 32 on the trigger From the magazine 29 a cartridge moves into the position shown in Figure 1. If now the handle of the drawn back fork 15 is released, the fork is moved forwards into the normal position by the spring 19, and the breech block 23 moves with it and pushes the cartridge into the barrel (Figure 2). )When the locking move ment of the bolt 23 is completed the latter is turned by means of the further movement of the lever 15, through the spiral groove 40 of the stay 21 and locked.

When the trigger 34 is pulled the hammer 27 is released and strikes against the firing pin 24, which fires the cartridge.

After the bullet `leaves the barrel 2, the pressure of the gases passing out of the barrel 2 acts on the end 9V of the sleeve 4 and causes the latter to move forwards, the spring 7 of which its at the same time compressed. The pressure of the gases move the sleeve 4 so far forwards that openings ,30 provided in the sleeve 4 are freed from the barrel 2 and through which the gases can escape to the atmosphere. At this moment the free end of the tongue 11 is released and springs upwards and the nose 12 moves in front of the bridge piece 16 of the fork 15. `When the gases begin to escape also through the openings 30 in the sleeve 4 the pressure of the gases acting on the front end 9 of the sleeve 4 quickly falls until `the power of the compressed spring 7 preponderates, and causes a rearward movement of the sleeve 4rand`the tongue 11 which carries with it the fork 15 and theV spring 19 is' put under tension. A

Through the rearward movement of the fork and the depending lever 25 the hammer 27 is cocked. At the same time the bolt by known means draws the empty cartridge case out of the barrel and ejects it through a side opening 31 (Figure 6).

)When the sleeve 4 has reached its normal position (Figure 1) and the fork 15 with the bolt 23 is in the rear open position, the front end 13 of the tongue 11 strikes against the tapered lower surface of the stop 14, and the tongue11 is so depressed that its nose 12 moves down and releases the bridge Vpiece 16jof the fork 15 and through the action of the spring 19 the fork 15 together with the bolt 23 moves forwards, the bolt pushing a fresh Cartridge into the magazine.

,In this manner the gun acts similarly for automatic shooting and for Athe discharging of single bullets. The delivery of single bullets as well as the automatic shooting are rendered possible by the peculiar formation -ofthe trigger mechanism (Figures 1, 2, 9

The hammer 27 is retained m its and 10). cocked position by a catch lever 32 (Figures 1 and 2) having a projecting nose which engages with a projection on the hammer, the catch lever 32 is engaged by an arm 33 on thetrigger 34. Behind the trigger 34 and in the lock 26 is mounted a pin or bolt 3G (Figures 9 and 10) which has opposite the trigger 34 a flattened surface 37 and carries outside the lock an adjusting arm 35. This V10 so that the trigger 34 when pulled engages in the flattened surface of the pin 36 and can Vtherefore be completely pulled back and the catch lever 32 is brought entirely out of the path of 'the hammer 27 so that after being cocked by means of the lever 25, it is not engaged by the catch 32 but moves back at once and fires a fresh cartridge. The bullets therefore follow one another automatically.

vThe same eiect asV the pin 36 can foi` instance be obtained by an eccentric mount-ing of the same instead of by means of the flattenedV surface.

The described rifle can also be employed as an ordinary repeating weapon, which is very important in the case of cartridges which fail to act where unreliable ammuni vtion is employed.

That I do claim as my `invention and desire to secure by Letters Patent isz--` 1. In a fire arm, the combination with a gun barrel and-a breech bolt movable into and out of closing position, of a sleeve surrounding the barrel and movable forwardly under the action o-f the gases of combustion, spring means for returning the sleeve to a normal position of rest, spring means acting upon the breech bolt to move it from an open to closed position, a coupling between the said sleeve and the breech bolt, including a partinovable with the former, a part movable with tlhe latter, said two parts including means operative at the end of the forward motion of the sleeve to interconnect the said two parts, and means operative near the end of the return motion ofthe sleeve to make the means interconnecting the said two parts ineffective.

2. Apparatus according to claim 1, wherevI r2o in the means for interconnecting the said l two parts includes a spring tongue von one l of said parts, and a shoulder disposed on the other of said parts'in the path of movement ofthe `Spring tongue;

'3Q Apparatus according toclaim'l, where .in the` means for interconnecting the two parts includes a shoulder on one of the said parts, av spring latch on the other of said parts. `and wherein ,theu means for makingV the-means interconnecting the said two part-s-l vineffective is a stationary'member .in the v' path of movement of the said' parts'.

4. Apparatusaccording to claim l, wher Y in the part movable with thelbreech bolt is l a forked memberthe arms of which are sub-v f s'tantiallyQ` parallel with the lbarrel and wherein the part ymovable `with the ysleeve is member and 2L Spring-.actuated memberbo'n i* f the part .movable with the sleeve disposedi-,O

engage lthe bridge.

5. Apparatus according `'to claim wherein the part movable with the breech bolt is a `forked member the arms of Vwhich are `substantialb7 parallel withthe"Y barrelv and wherein thepart movable with the sleeve vis disposed to move between the armsv of the 30 fi' i forked member, the means for interconneeting the two parts comprising a bridge near the forward-endet the arms of the forked .member and a. spring-actuated member on the part movable with thesleeve disposed to engage the bridge and the means for mak-y ing' the means for interconnecting the said Atwo parts ineffective being disposed between the arms of the' forked member'in ther path of the spring-actuated member.V

In testimony whereof I have my hand.

hereunto Vset l JosEF-'NErsoH'- Y f 

